Heater Supports material spec

[Freddy Martinez]

What is the typical material used for tubes supports on a Coker Heater?
 
Thanks, RI.

[antonio saura Cebrian]

Some specificacion for this heater
ASTM specification a grade A351 HK40
 

TUBE SUPPORTS

Location (top, bottom, intermediate):


RADIANT ENDS

RADIANT INTER.

CONV. ENDS

CONV. INTER.

Material (ASTM specification and grade):


TP 304 SS

25Cr-20Ni A-297-HK

S.S.

25Cr-20Ni A-297-HK

Spacing:




in
14′- 7″ MAX

14′- 7″ MAX

13′ – 1″ MAX

13′ – 1″ MAX

Coating (type and thickness):



5″ – CASTABLE

NONE

4″ – CASTABLE

NONE

Design Metal Temperature



F
1.000

1.780

1000

1,700 / 1,390 / 1,040

 
Refractory Anchors (Material & Type):

 
TP304SS V-CLIPS

N/A

TP304SS V-CLIPS

N/A

TUBE GUIDES
 
                  
           
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
 
 

[antonio saura Cebrian]

 
TUBE SUPPORTS

 

 

Location (top, bottom, intermediate):


RADIANT ENDS

RADIANT INTER.

CONV. ENDS

CONV. INTER.

 

Material (ASTM specification and grade):


TP 304 SS

25Cr-20Ni A-297-HK

S.S.

25Cr-20Ni A-297-HK

 

Spacing:




in
14′- 7″ MAX

14′- 7″ MAX

13′ – 1″ MAX

13′ – 1″ MAX

 

Coating (type and thickness):



5″ – CASTABLE

NONE

4″ – CASTABLE

NONE

 

Design Metal Temperature



F
1.000

1.780

1000

1,700 / 1,390 / 1,040

 
 
Refractory Anchors (Material & Type):

 
TP304SS V-CLIPS

N/A

TP304SS V-CLIPS

N/A

[antonio saura Cebrian]

also TP304 SS   25 Cr-20Ni A-297 HK in Radiant section

[Claus Graf]

The heaters I’ve seen had 25 Cr 20 Ni cast tube supports in the radiant section.
 
However, depending on the fuel quality, higher alloy of Cr-Ni might be required.
 
The link below might be helpful:
 
http://www.fwc.com/publications/tech_papers/files/tindall%2Epdf
 
Regards, CG

[Author]

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